In Russia, four persons have been detained in connection with the fire in a night club in Perm which claimed 112 lives. About 130 people remain hospitalized with injuries from the blaze which happened early Saturday. The Federal Investigative Committee said the suspects, the club's owner, the executive director, the artistic director and a businessman hired to install pyrotechnics on the night of the blaze were taken into custody following an order by a District Court. They are suspected of negligence causing multiple deaths and violating fire safety rules. Russia is observing today as a national day of mourning as a mark of respect to those who died in the Perm tragedy, one of the worst blaze in the country in decades. Russia records up to 18,000 fire deaths a year, several times the per-capita rate in the United States and other Western countries. President Dmitry Medvedev has demanded lawmakers to draft changes to toughen the criminal punishment for failing to comply with fire safety standards.